[gdal-dev] gdalwarp - dataset shifted several metres compared to arcgis

[Travis Kirstine]

Try including the --debug flag when running the warp, I believe it will
provide details on how the transformation was performed as well

On 26 January 2017 at 21:04, Chris Waigl <cwaigl at alaska.edu> wrote:

> Hi Nicole,
>
> I have not worked with this dataset or with these exact projections and
> can only speculate, but since no one takes a stab at it…
>
>
>    - Have you tried experimenting with leaving out the -tr and/or -tap
>    parameters?
>    - My first thought was that it might be a problem with source or
>    target datum, but that seems not so likely. Still, also EPSG:32232, which
>    uses WGS 72. If you have rally old data it might be that.
>
>
> In any event, I’d advise inspecting the output of gdalinfo for both your
> target and your 2006 version.
>
> Chris
>
> --
> Christine (Chris) Waigl - cwaigl at alaska.edu -  +1-907-474-5483
> <(907)%20474-5483> - Skype: cwaigl_work
> Geophysical Institute, UAF, 903 Koyukuk Drive, Fairbanks, AK 99775-7320,
> USA
>
>
>
>
>
>
>
> On Jan 26, 2017, at 6:28 AM, Nicole Stoffels <stoffels at f2e.de> wrote:
>
> Hi,
>
> I am trying to reproject the CORINE 2012 dataset from LAEA (EPSG:3035) to
> UTM 32 (EPSG:32632). I use the following command:
>
> $ gdalwarp -overwrite -s_srs EPSG:3035 -t_srs EPSG:32632 -tr 100 100 -tap
> -dstnodata '-9999' g100_clc12_V18_5.tif corine2012_utm32n_test.tif
>
> In the past years my colleague used ArcGIS for this operation, but since
> we switched to Linux, I have to find a new solution. When I load the new
> dataset generated with gdalwarp to QGIS and compare it with the old 2006
> version built in ArcGIS, I have an offset of approximately 15m south and 3m
> east for the single raster squares.
>
> Now I am not sure if I simply forgot an important flag in my
> gdalwarp-command or if the problem simply lies within ArcGIS (my colleague
> used the standard options that were proposed).
>
> Thank you for any ideas,
>
> Nicole
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